This portable PC has an HDD storage medium, which is the most commonly found storage medium on portable PCs of this type and age. HDD is a traditional storage drive which stores the information on magnetic disks. HDD drives are slower than other forms of storage such as solid state drives (SSD) and flash drives.
It may also be worth also looking at one of the alternative notebook PCs that have an HDD storage media currently available including because of it's better review score, the W541, or the 11e (£398.62) both from Lenovo or the Asus N550JK.
If you would prefer a laptop with a better storage medium then you might want to consider the Asus N550JK (SSD), the DELL Precision M3800 (SSD), or the Lenovo ThinkPad W541 (SSD) which is also higher rated.